Ala. Code § 2-15-193
Any compulsory, voluntary or recommended program for the control and eradication of brucellosis disease in cattle as may be established under authority of this article shall be carried out under the supervision and direction of the Commissioner of Agriculture and Industries and the State Veterinarian through the facilities of the Department of Agriculture and Industries.
The State Veterinarian, his associates and assistants or other authorized employees of the Department of Agriculture and Industries are hereby authorized to enter any place or upon any premises or into any barns or other buildings, including stockyards, where livestock are kept for any purpose or to stop any truck, vehicles or other carriers transporting cattle in order to perform any inspection, testing, examination or any other duties that may be required under a brucellosis disease control and eradication program established under authority of this article.
Any person who shall refuse, oppose, prevent or interfere with the State Veterinarian or other authorized officials from entry into any place for the purpose of carrying out his or their duties as authorized under this article shall be guilty of a misdemeanor.
Ala. Code § 2-15-193 (1975)